Elevator.



No. 680,871. Patented Aug. 20, |901. W.F.LENARD.

ELEVATUR.

(Application led June 7. 1900.)

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No. 680,871. mmm Aug. 2o, 19m.

W. F. LENARD.

ELEVTOR (Application filed June "i, X900.v (No Model.) 2 SlpeetsSheet 2.

NTTTnV STaTns aTnNT @Trina IVILLIAM F. LEONARD, OF COLUMBUS, OHIO.

ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 680,871, dated August 20, 1901..

Application filed .Tune 7, 1900.

To cir/ZZ whom it may concern.-

Beit known that I, WILLIAM F. LEONARD, a citizen of the United States, residing at Oolumbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Elevators; and I do hereby declare the following to beafull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The object of this invention is to provide simplified and economical mechanism for automatically opening and closing the doors at elevator-landings.

The'invention consists in the parts and combinations of parts hereinafter described, and pointed out in the claims.

In the accompanying drawings, showin g an embodiment of the invention, Figure l is a View in elevation of a car broken out horizontally, equipped wlth the mechanism, some parts being omitted for the sake of clearness. Fig. 2 is a View of the door with its closingweight. Fig. 3 is a plan view of the mechanism on the car for Winding up the dooropening weight, with the coperatin g devices on the car and` shaft for releasing said dooropening weight When the car stops at a landing. Fig. 4. is a side View looking toward the right of Fig. l, the edge of the Well at the landing being also shown. Fig. 5 is a detail perspective of the device for releasing an opened door when the car starts away from the landing.

l designates the car. Journaled horizontally under the floor of the car is a shaft 2, loose on which is a rope-winding drum 3, and xed on which is a bevel pinion or gear 4. The drum has a laterally-projecting pin 3a. The bevel-gear 4 engages a larger gear 5, supported in a suitable bracket or frame 5a, Fig. 1. Sliding vertically in the axis of the gear 5, but rotating with the said gear, is a shaft 6, having in its lower end a grooved collar 6, engaged by the short arms of ordinary Weighted governor-levers 7. The upper end of the shaft 6 is furnished with a grooved collar Gb, that is engaged by theinner arm of a double crank-shaft 8, journaled at the under side of the car. Mounted under the car is a camslide 9, having cams 9 and 9", (see also dot- Serial No. 19.4.38. (No model.)

ted lines, Fig. 2,) that keep the pivoted finger l0 in the shaft 2 in or out of position to engage or to be disengaged from the pin 3a on the drum 3, according to the position of the slide. If the slide is in, the end of the finger is kept disengaged from the pin 3n by the cam-surface 9a, and if the slide is out the pin is held by the cam-surface 9b in position to engage the pin 3f. Attached to the drum is one end of a cord 11, that passes over pulleys 12 and 12a near the top of the car and has on its other end a Weight 13. This cord 1l passes through an eye on an arm 9", hinged to the slide 9, and on the cord, on opposite sides of the eye, are stops 11a and 1l, that shift the slide in and out When the cord has been Wound or unwound from the drum to the proper extent, as hereinafter set forth. The cord ll also has a button llc, that is caught by a spring-catch 14 when the cord is Wound up to the proper extent. The catch 14 has a trigger 14a, that projects beyond the face of the car.

Hinged in the elevator-Well near each of the several landings is a plate l5, that can be moved by the outer end of the cranked shaft 8 when the latter is actuated by the shaft G to move the catch 14 and release the button 11C. The cord ll is also furnished with a pin 1l, that projects horizontally through a slot in a horizontal runway 16 along the top of the car. The lower side of the runway 16 is cut away at 16a, so that the pin 11C can be pulled down, as hereinafter set forth.

Sliding vertically on the front of the car is a jointed rod 17, having a hook 17'a at its upper end. The lower end of this rod 17 is connected eccentrically to a motor-controlling device 18, so that if the motor-controller is operated to move the car either up or down the shaft or Well the rod 17 is pulled down.

The dooil 20 is the usual sliding door and has a weight 20a for closing it. The door also has a catch 2l on the movable part of a toggle-frame 2l, secured to the door, the said hook engaging when the door is closed a catch 22 in the shaft or well. The weight 13 on the car is sufliciently heavier than the weight 20 to open the door when the Weight 13 acts on the door.

Extending vertically in the well is a fixed IOO rope 23, on which works a pulley 3", fast on the outer end of the shaft 2. As the car moves up or down the shaft the frictional contact of the rope and pulley rotate the shaft 2. A small pulley 21 on the car to make a bend in the rope, and therefore to insure and increase the frictional contact of the rope and pulley, as well understood, can be employed.

The operation is as follows: Let it be supposed that the weight 13 is down, the door open, and the car about to be started from one landing to another. 'In this state of facts the slide 9 and the stop 11b are in their outer position and the cord entirely unwound from the drum 3. Further, the end of the longer arm of the finger 10 will be in position (if the shaft 3 be rotated) to strike the pin 3a on the drum and carry the drum with the rotation of the shaft 2. W'hen the car is started, the shaft 2 is rotated, and with said shaft the drum 3 will also be rotated and the cord 11 wound up thereon until the stop 11a pulls the slide 9 in. When the slide is pulled in, the cam 9a disengages the finger 10 from the pin 3a and the winding operation ceases; but slightly before the finger is so disengaged from the pin 3a the button 11c has passed below the catch 14., and the weight 13 is thus held suspended. When the motor-controller is operated to give motion to the car, as before stated, the jointed rod 17 is pulled down, thus pullingr the pin 11d, which at that time is directly under the hook 17a, as shown in Fig. 5, down and away from the frame 21 and allowing the weight 2Oa to close the door.

The door, however, closes before the car moves away any considerable distance. When the car isin motion, the governor-balls are also in motion and the shaft pulled down. When the shaft 6 is down, the outer end of the crank-shaft 8 is not in position to act on the plate 15 at any of the landings; but when the car stops at or near a landing the governorballs drop and depress the outer part of the crank-shaft against the plate 15, which being moved throws the latch 14 off the button 11C, thus allowing the Weight 13 to fall and open the door, as before indicated. The operation of the Winding device and the openin g and closing apparatus is the same whether the car is to move up or down the well, eX- cept that the shaft 2 is turned in one direction going down and in the opposite direction going up. It will thus be observed that both the opening and closing of the door are entirely automatic and are respectively effected simply by the usual operation of the motor-controller in stopping at and starting from any landing.

The several parts herein shown and described can of course be modified to some extent without departing from the scope of the invention. As one illustration of this I would suggest that a spring in the place of fer to use a Weight, because of the uniformity and noiselessness of its action.

What I claim, and desire to secure by Letters Patent, is-

1. In combination, an elevator shaft or well, a car to move therein, a door to said shaft, a weight to close the door, and a preponderating Weight on the car to open the same adapted to be automatically brought into action when the car stops opposite the door.

2. In combination, an elevator shaft or well, a car to move therein, a door to said shaft, a weight to close the same, a preponderating weight on the carto open the same, means for automatically causing said Weight to open the door when the car arrives and stops opposite the door, and means for automatically restoring said weight to its operative position when the car moves from the door.

3. In combination, an elevator shaft or well, a car to move therein, a door to said shaft, a weight to close the door, a preponderating weight on the car to open the door, means for automatically causing said weight to open the door, when the car arrives and stops opposite the door, and means on the car for automatically restoring said weight to its operative position when the car moves from the door.

4. In combination, an elevator shaft or well, a car to move therein, a door to said shaft, a latch for said door and a weight to close the door, a preponderating weight on the carto open the door, means for automat ically causing said weight to release said latch and open said door when the car arrives and stops opposite the door.

5. In combination, an elevator shaft or well, a car to move therein, a door to said shaft, a latch for the door and a weight to close the door, a preponderating weight on the carto open the door, means for automatically causing said weight to release said latch and open said door when the car arrives and stops opposite the door, and means for automatically restoring said weight to its operative position.

6. In combination, an elevator shaft or Well, a car to move therein, a door to said shaft, a weight to close the door, and a preponderating weight on the car for opening said door, a weight-elevating, and a weightreleasing mechanism on the car adapted to be operated by the motion and cessation of motion, respectively, of the car.

7. In combination, an elevator shaft or' well, a car to move therein, a door to said shaft, a weight to close the door, and a preponderating weight for opening the door, a mechanism for elevating said preponderating' Weight operated by the motion of the car, and a mechanism for releasing said weight operated by the cessation of motion of said car.

8. In combination, an elevator shaft or' means for automatically releasing said preponderating Weight when the oar arrives and stops opposite the door, and means operated by the operation of the motor-controller for releasing the Clooi1 from the preponderating Weight. 1

In testimony whereof I ax my signature v zo in presence of two Witnesses.

WILLIAM F. LEONARD.

Witnesses:

GEORGE W. ALFRED, GEORGE M. FINCKEL. 

